collett



F. W. H. COLLETT.

MATIRESS SIDE SUTCHING MACHINE.

APPLHIAT ON FILED APR. M. 1919.

Patented June 8, 1920.

H SHEETSSHEET l- F. w. H. comm. MATTRESS SIDE STITCHING MACHINE.

APPLICATION FILED APR. l4. I919.

F. W. H. COLLETT. MATTRESS SIDE SHTCHING MACHINE. APPLICATION FILED APR. :4. 1919.

1 ,342 ,423. Patented June 8, 1920.

H SHEETS-SHEET 3- VIII/III v Q j? lfoz eruow: f5 8467 wcmwzzew F. W. H. COLLETT. MATTRESS SIDE STITCHING MACHINE.

APPLBCATION FILED APR. 14 9X9.

F. W. H. COLLETT. MATTRESS SIDE STITCHING MACHINE.

APPLICATION FILED APR. 4 1919. 1,342,423. Patented June 8, 1920.

ll 5HEE$S"[T 5- I1 ave? vi /01': fiedericic Wfifloilew F. w. H. COLLETT. MATTRESS SlDE smcuma MACHINE.

APPLICAHON HLEU APR. H. 19l9.

Patented J mm 8, 1920.

\I SIREN-SHUT 6.

F. W. H. CULLETT.

MATTRESS SIDE STITCHING MACHiNE.

APPLICATION HLED APR. 14. 919.

Patented June 8, 1920.

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F. W. H. COLLETT. MATTRESS SIDE STITCHING MACH'NE.

APPLICATION FILED AFR. IM 1919.

Patented June 8, 1920.

F. W. H. COLLETT.

MATTRESS SIDE smcums MACHINE.

APPLICATWN FILED APR. I4. I919.

Patented June 8, 1920.

I! SHEETS-SHEET 9- I? L226 711/0 71 de-r6070 m'oiki.

afiij F. W. H. COLLETT.

MTfiEss SIDE STITCHING MACHINE.

APPLICATION FILED APR. 14, 1919.

.1 342,423. Patented June 8, 1920.

I1 SHLE1S-SHEET I I.

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UNITED STATESWPATENT orFicE.

mnnnmox w. a. comma, or cannninsn mnssacnvsn'rrs, ASSIGNOB. 'ro

, 51 (3632911511011 or MAINE.

1 Application flied April 14,

To all wliomjt may concern:

Be it known that I Funumucn' W. H. (101.- min, a citizen of the llnited States, and restdent of Cambrid e, in the county of Middle- 5 sex and State 0 Massachusetts, have invented an Im rovement in Mattress-Side- Stitohing Mae ines, of which the following descri tion, in connection with the accompanying drawings, is a specification, like reference characters on the drawings representing like parts.

This invention relates to a mattress side stitching machine the object of the invem tion being to produce an organized machine for side-stitching mattresses.

The urpose of what, is known as sidestitching is to connect the fabric or covering around the sides of the mattress with the stufiing of the mattress from point to point so in order to keep the sides approximately sqnai-e or to prercntthcm from bulging under the expansive action of the mattress stalling.

in some cases what is known as roll-edge side-stitching is used in which the fabric around the sides of the mattress is engaged by thread or twine extending diagonally through the stuffing and through the top surface fabric of the mattress in one line of B0 stitching. and through the side surface. stalling. and bottom surface in another line of stitching. Thus so long as the stitching holds properly it keeps the corners or lines of {auction of the side sllrfacc with the top an bottom surfaces square.

\ The side-stitching has usually been performed by a hand operation with a continuous length of twine or thread which is passed by a needle through the side surfaces from point to point and engaged with the stufling, or with the stuffing and the top or bottom surface fabric as the case may be. leaving a short length of the twine showing on the fabric between adjacent needle holes through which the twine passes to the inside of the mattress. If such continuous twine or line of stitching becomes broken at any point it loosens the entire seam which soon becomes inefiective for retaining the ma these in proper shape or condition.

The present invention is embodied in an or ganized machine for side stitching adapted to produce side-stitching of the roll-edge type in which the side surface fabric is con Specification of Letters Patent.

Patented June 8, 1920.

1919. Serial no. 290,005.

nectcd from point to point with the to 3 sur- 5! face fabric by one line of stitching, am from point to point with the bottom surface fabric by another line of stitching, th character of the stitching being however iiferent from that resulting from the continuous runnipg twine as applied in the usual hand stitching operation.

In the operation of the machine Herein shown and described as an embodiment of the present invention the side surface fabric of the mattress is tied to the to or bottom surface fabric at given points by loops of the twine or thread, the ends of which are tied together by a knot, in this instance of the kind known as a weavers knot, the knot being drawn through the fabric to the insideof the mattress so that nothing shows upon the outside of the mattress except the short length of thread extending between two adjacent needle holes which forms the tying or gnch oring engagement of the twine with the The machine forming the subject of the present invention comprises a stationary tailc or holder for the mattress. and a travel- 30 log stitching. including knot tving, mecha' nism. mounted for movement on a suitable guideway. and acted upon by a suitable feed mechanism which advances the stitching mechanism from stitch to stitch along the 35 side of the mattress on the mattress support.

'F or convenience the component of the machinc which consists of the mechanism -i'or intrrulucing the thread and tying the knots considered as a unit will be called tlic o stitcher. and in the present example of the invention the stitcher comprises two similar sets of coiipcrating stitch forming devices; with suitable actuating mechanism common to both sot-s. one of which acts at the 5 upper corncr of the mattress to stitch or tic togethcr the side surface fabric next to the stitchcr and the top surface fabric of the mattress. while the other acts in a similar manner at the lower corner to tie together the side fabric and lower surface fabric of the mattress.

The invention comprises the general organization of the machine as above indicated, as well as various combinations of mechanism for performing the stitching. including knot-tying. operations as will be mplained in connection with the embodiment of the invention shown in the accompanying drawings.

By having the machine so organized that the stitching is performed along both edges or corners of one side of the mattress at a time, not only is the output more than double that of a machine capable of sewing onlg, one corner at a time, but the stresses on the mattress are balanced and there is no distortion such as results when one corner I definite length extending from a ball or or edge of one side is stitched before the other corner is stitched.

Stitching'one corner while the other corner remains unstitched produces distortion of the side of the mattress, and an unevenness in thh distribution of the stufling material which are very diflicult to eliminate when the other corner is subsequently stitched.

It will facilitate the understanding of the machine to state that in general the following terminology will be used.

The term bight indicates a fold of the twine back against itself, the part of insup ply to the fold being called the standing part and the shorter art terminating beyond the fold being cal ed the end.

loop is a complete turn of the end portion of the twine and may be regarded as a rather open bight with the end crossing the standing part of the twine.

A closed loop is merely an endless piece of material such as would result from fastening a loop at the intersection of the end and standing part, or from tying together the ends of a comparatively short piece of twine.

Each stitch produced by the machine hcrcin shown as an embodiment of the invention is a closed loop encircling a portion each of the side fabric and of the top or bottom fabric, as tho case mav be. between two needle holes, and also encircling the portion of the stufiing lying between the side and top or bottom fabrics and between lines extending from the needle holes in the side fabric to the. corresponding needle holes in the bottom or top fabric.

\Vhile the stitch is made from a single twine of indefinite length, the knotted loop. resulting from each cycle of stitch forming operations is cut off from the supply thread. leaving only the short length forming the .closed loop as the final twine component of each stitch.

A weavers knot may be used to tie together two ends of a short length of twine to form a closed loop, and such knot may be'regarded as comprising a simple bight at one end, and a loop formed of the other cnd around the standing part and end of said bight and having its own end passed through the bight. In the machine to be described the stitch forming instrumentalities comprise a needle, operating from one side of the material to penetrate it and emerge with a hight at the other side, and a set of contrivances, herein collectively referred to as the knotter, which with some further accessory devices coo crate with the needle.

he complete cycle of operations for making each stitch comprises two descents of the needle, at the first of which n bight is presented to the knotter, and at the second of which the first bight which was ncscntcd to the knottcr has been converted thereby into a loop, through which the bight presented by the needle at its second descent is passed, whereupon said loop, which thus encircles the standing part and end of the second bight, has its end passed through said second bight so as to complete the formation of the weavers knot, after which a surplus which formed a part of thcend of the first bight is cut olf and the standing portion of the second bight is cut between the knot and the needle leaving a suliicieut portion beyond the needle to serve as the end of the first bight to be presented by the needle for the production of the next stitch.

In the accompanying drawings:

Figure 1 is an cnd elevation on a reduced scale of a complete mattress side-stitching machine embodying this invention;

Fig. 2 a rear elevation thcrcof:

Fi 3 an end elevation on a larger scale of the traveling stitcher showing a portion of the frame work of the main niachinc, including the support or holder for the mat tress in section;

Fig. 4 a sectional elevation on a still larger scale of the stitchcr. showing mainly only the components thereof cmbodicd in the stitching mechanism which acts upon the lower corner of the mattress:

Fig. 5 an enlarged sectional detail showing the needle and a portion of the cooperating knot-tying mechanism in the position occupied just after the first advance of the needle through the material at the beginning of a cycle of the operations comprised in a stitch forming. including knottying. operation at one point on the corner of the mattress;

Fig. 6 a perspective view of a portion of said devices in the same relative position as shown in Fig. 5;

Figs. 7 and 8 details showing successive positions of tlie knot-tying devices which are assumed between the first and second needle descents in a complctc cycle of operations;

Fig. 9 an elevation similar to that of Fig. 5. but with the parts in the position occupied at the second passage of the needle through the material;

, Fig. 10 a representation of the parts shown in Fig. 9 seen from a diifercnt angle loo or stitch has been has been properly Fig.

and with the needle in the same position as in Fi 9, but with some of the knotter parts in a 'fierent position;

Fig. 11 a representation ofthe same parts as in Fig. 10, but in the position occupied when. the needle has traveled a short distance in the direction to withdraw from'the fabric;

Fig. 12 arview from the same point as in Figs. 10 and 11 with the parts in the osition assumed when the needle has a at completed its movement of withdrawal from the material, there being shown also a portion of the cutting mechanism b which the twine is cut oil after the comp ete knotted made;

ig. 13 a sectional detail on line X of Fig. 12 of a portion of the thread clamping and pulling mechanism which cooperates in ti htening the knot after the twine presente to the knotter at the first needle stroke looped around and enga d ,wit the bight presented at the secon needle stroke for the formation of the knot as shown in Fig. 11;

Fig. 14 a sectional elevation on line X, 3 showing the stitching mechanism for the lower corner of the mattress mainly in elevation from the same view oint as in Figs. 10 and 12, and a portion 0 the stitching mechanism for the upper corner of the mattress in section;

Fig. 15 an end view of a portion of the knot-tying mechanism that coiiperates with the needle;

Fig. 16 a sectional detail of a portion of the knotter;

Fl 17 an enlarged sectional detail showing t e knotter in elevation and adjacent arts, of the mechanism.

Figs. 18, 19, 20, 21 details of the needle 0 rating mechanism and certain twine c amps cooperating therewith in the knottyin operation;

F1 22, a longitudinal sectional detail of the notter mechanism;

Figs. 23 and 24 details showing portions of the needle bar and its actuating mechanism, and the mechanism for operating the clamp jaws of thel motter mechanism;

Figs. 25 and 26 'se tional details showing a part of the clamp jaw operating devices of the knotter;

Fig. 27, a detail showing a portion of the actuating mechanism for the twine cutters;

and

Figs. 28 and 29, details of the feed and stolp mechanism.

eferring to Figs. 1 and 2, the machine in its general or anization comprises a table or holder 2 or the mattress 3 to be operated 'upon, shid table being mounted supporting frame 4, adjaupon a suitable cent to a supporting frame 5 for the principal working parts of the machine,

which vided (better shown in are located at the rear, the operator in charge of the work standing at the opposite or front side where the various handles for controlling the a paratus are located. r

'()n the main Frame near the rear edge of the table a gaging Hang; or stop 6 is proig. 3) which constitutes an edge-gage for the side of the mattress when in proper position on the table to be sewn, and a clampin bar 7 is provided for engaging the top 0% the mattress for its entire length at a short distance from its edge, directly over the edge of the table 2 (see Fig. 3) to hold the same firmly durin the stitching operation.

Sai clamping bar 7 is shown as mounted in an elbow lever 8 fulcrumed at 9 on the framework and connected by a link 10 with an operating lever 11 fulcrumed at 12 on the framework and adapted to be moved by the operator from the full to the dotted line position shown in Fig. 1 to release the mattress, and from the dotted to the full line position to clamp and hold the mattress after it has been properly placed in aged position against the engaging stop ange 6.

Another operating andled lever 14 at the front of the machine is connected by rod 15, with an arm on a rock shaft 16 having another arm connected by link 17 with an arm connected with the clutch control finger 18, (see Fig. 28) which acts on a suitable clutch mechanism to effect the starting or sto ping of the machine at an time.

he frame 5 at the rear of t e machine includes longitudinal beams 19 which serve also as a track or uideway for the stitcher carriage 30 whic supports the mechanism of the stitcher and is shown as provided with wheels 31 to facilitate its movement along the guideway 19.

The said carriage 30 and mechanism supported thereon in its entiret will be referred to as the stitcher, and its mechanism includes two complete sets of stitching instrumentalities with actuating mechanism common to both, whereby they are caused to operate concurrently, one at the upper and the other at the lower corner of the side of the mattress clamped on the table 2, as will readily be understood from Fig. 3.

\Vithout at this point explaining the stitching forming operation in detail it should be understood that a complete cycle of operations causes a single closed loop of the twine to be formed with its ends tied together by a weavers knot, and with said loop inclosing a little of the fabric of the side of the mattress, and of the top or bottom as the case may be, and of the stalling of the mattress lying between these portions material, one at a litt e distance from the 130 other, the portion of the fabric and material between the needle holes being what is incloscd in or encircled by the knotted loop.

Such a knotted loop or stitch is cmnplete in itself and the twine is cut 0H between the. knot and the needle after the knot has been tied tightly. and in order to make a succession of such stitches along the side of the mattress presented to the stitching mechanism; or to proceed with the side stitching automatically. provision is made for feeding the carriage 30 of the stitcher intermittently between the successive complete stitch cycles of operation. during each or which the said carriage remains stationary.

Still referring to Figs. 1 and 2 the. working parts of the machine are all actuated from a main shaft-2U, said shaft having a driving pulley 2i loose th reon and adapted to be connected by a clutch 22. the details of which need not he described until later, with a cam 23. fast on shaft 20. which acts upon a cam roller on the end of an arm 24 connected with a rock shaft 25. (see Fig. :2 having two pawl carrying arms 2U. 27 provided with pawls 2H. 2! (see Figs. 28. 28)) which are adapted to act upon crown teeth on a sprocket wheel 32 which actuates a chain 3; connected with the carriage 3H and supported by another sprocket 34 at the other end of the frame 5. (see Fig. 2).

shifting ,device as best shown at the left hand in Fig. 2, and in Figs. 2h. and 2!).

causes one or the other of the pawls 28. 25)" to remain out of reach of the teeth of the sprocket wheel 32, and as the said pawls operate in the same direction but at opposite sides of the center of the sprocket they will cause the latter to be turned for the space of one or more teeth in one or the other direction according as one or the other of said pawls is in operation, and will thus produce a movement or advance of the carriage 30 in one or the other direction at a certain point in the rotation of the cam 22- at a time when the stitching mechanism has completed a cycle of operations and s with the needles withdrawn from the nmttress.

The shifting or reversing device or yoke 35 is connected with a rod #56 extending the length of the frame parallel with the track 19 on which the carriage 30 travels and said rod is provided with .adjustablc engaging blocks or tuppcts 3T. 38 adapted to be acted upon by a projection Bihfrom the carriage In! when iharrivcs at the propcr position to complete a line of stitching along one side of the mattress.

\\'ith the parts in the position shown in Figs. .3. 2 and il the pawl 28 is frcc to operate and the pawl 25 is idle. being kept out of reach of the teeth by a portion of the yoke 35 engaging a pin projecting from the side of the pawl as shown. The feed movement of the carriage 30 is then toward the right as seen in Fig. 2, and when the projection 3t) arrives at the tappet 38 it moves the same so as to move the yoke 35 to a. position to cause the pawl 28 to stop operating and to release the pawl 25). and the projection -10 of the yoke 35, (see Fig. 28), engages the arm 181) connected with the finger 18, and movcs it to position to cause the clutch 22 to be disengaged. so that the cam 23 and shaft 2! are stopped from operating and the action of the machine automatically ceases when the end of the side stitching along one side of the mattress is reached.

As the stitcher is stationary during the formation of each complete knotted loop or stitch. it is immaterial in which direction the feed takes place from one stitch to the next. and in order to save time after the stitching has been completed in one direction. say from left to.right in Fig. 2, the mattress is unclamped and turned by the operator and the side next to be operated upon (or the side of another mattress if one has just been completed) is then stitched in a movement of the carriage from right to left.

ln order to facilitate the movement of the carriage 3H indcpemlently of the automatic feed just described. a hand operated feed wheel 320 (see Fig. l) is provided. preferably located near thc middle of the machine. which is connected by shaft 321. sprocket whccl 3:22. and chain 323 with a sprocket whccl 3:24 iixed on the same shaft as the pawl operated sprocket wheel 32 above described. so that the operator by turning the wheel 32 when the pa wls are disengaged, or by turning it in the direction permitted by the pawl. if one is engaged. the carriage may be moved along to the desired position on its supporting track.

lh-ferring now to the stitching mechanism. the general organization of the parts relative to the material operated upon is best shown in Fig. 23.

To avoid possible ambiguity the entire mechanism which acts upon the twine in applying ii' to the mattress will he called the stitching mechanism. and iuasn'mch as the instrumcntalitics which operate at the upper corner are substantially the same as those that act at the lower corner of the mattress. the "detailed des ription will be confined mainly to the mechanism which acts upon the lower corner. from which the operation of the mechanism which acts at the upper corner will be readily understood.

'lhc stitching mechanism for acting upon onc corner of the mattress. taking for examplc the lower corner. comprises a needle lilo which penetrates first the lower surface fabric and thcn passes diagonally upward and emerges with the twine from the side surfacefabric; and appliances (which will are commonly "mg a spline connection at driven by the pulley be'referred to collectively, or as a unit, as the knotter) which act upon the twine after it has emerged from the side of the mattress in coiiperation with the needle, to hold the bightpresented at the first penetration of the needle and cause it to be properly engaged with or tied to the bight which is presented at the second dienetration of the needle slightly to one si e of the place at which the needle first penetrated.-

'Although in the actual location in the machine the needle which acts at .the lower corner of the mattress penetrates with a diagonally upward movement, the penetrating movement of the needle will be referred to as the. descent, and the withdrawal movement as tlfe rise of the needle, as these terms used with various sewing mechanisms, and each complete knotted loop will be referred to as a stitch, and a complete row of such stitches along the corner of the mattress will be called a seam, although the twine is not continuous from one stitch to the next as in a common sewn seam.

Referring to Fig. 3-the enti-re stitchin f mechanism is actuated by a hollow cam sha t 50 supported in suitable bearings at the ends of the carriage 30, said hollow shaft 50 hav- 51 with the main shaft so that the cam shaft turns in unison with the main driving shaft 20, when 21 a-nd lutch 22, while being free to move to any desired position along the said driving shaft 20.

The principal working parts of the stitching mechanism are mounted upon a frame of suitable form and construction comhaving a prising a supporting arm 61 aflixed to pivotal support at 62 in a bearing ,the lower part of the carriage 30, the purpose being that the entire stitching mecha nism and its supporting frame may have a movement on the pivotal supbeing directly below the side a movement of the toward and from slight rockin 7 port 62 whic of the mattress, causes entire sewing mechanism the side of the mattress.

This causes pressers or work supports 63, 64 affixed to the frame 60 to be pressed inward so as to indent the side of the mattress when in the position shown in Fig. 3, which is the position occupied when the stitches are I take place.

being made, and to be slightly withdrawn from this position outward when the feed of the carriage and stitching mechanism is to This rocking movement of the stitching mechanism is produced by the cam 52 acting upon a roller 53 on the arm 61, the configuration of the cam being such as to hold the pressers 63, 64 against the work during the greater part of each rotation of the cam shaft, but to permitthem to be withdrawn slightly during a small fraction of each rotation of the main haft, at which time the projection of the feed cam 23 operates to advance the carriage tothe position for the next stitch, as above described.

This slight rocking movement of the main frame of the stitching mechanism does not materiall affect the action of the cams on the cam s iaft 50 upon the connecting mechanism by which said cams serve to actuate the various parts of the stitching mechanism in proper timed relation to one another, substantially all of the working movements taking (place while the frame 60 is in its forwar position and with the pressers 63, 64 holding the mattress material properly for the stitch forming operations, and serving as the usual table or work support to act as an abutment for the material while the needle penetrates it.

Cooperating with each of the work supporting pressers 63, 64 which support the material against the thrust of the needles near where they emerge is a movable resser foot, that of the mechanism at the ower corner alone being marked 65, which descends or moves toward the material to compress and clamp it against the cooperating work support 63 before the needle descends the first time, and retains it thus clamped until just before the feed movement takes place when said presser foot is lifted and at the same time the work support 63 is moved outward by the action of the cam 52 as above described.

As will be readily understood by reference to Fig. 3, the action of the work supporting presser and presser foot at the lower corner and that at the upper corner balance one another and iroducesubstantially equal compression of the stuffing material at the upper and lower corners, and maintain the side of the mattress in its proper relation substantially square with both the upper and lower surfaces of the mattress. The formation of the stitches at both n per and lower corners while the materia is thus held retains thematerial in the desired balanced condition with the side of the mattress square with the top and bottom, a result that would not be attained if only the upper or lower corner was acted upon in one sewing operation, and the mat-v tress had to be released and repositioned on its supporting table lief! re the other corner was stitched.

As it is unnecessary to describe in detail but one of the sets 'of stitch making appliated by a groove in the cam 52 on the cam shaft 50, which lifts the presser foot at the time when the feed cam 23 acts to feed the stitcher carriage to the position for the next stitch, as before described.

The needle 100 (see Fig. 3) isconnected by an arm 71 with a needle bar 72 adapted to more longitudinally in suitable bearing guides in the frame G0 and connected by a link 73 with an arm 74 on a rock shaft having its hearings in the carriage 30 and connected with another arm T5 having a cam roller operating in a groove in cam 56 which is constructed with two throws to cause the needle to make two descents at each rotation of the cam shaft 50 which effects one complete cycle of stitch forming operations or makes one stitch of the scam, the said cam groove having the proper configuration to effect such dwells or timing in the movements of the needle as will cause it to coiiperatc properly with the knotter and other instrumentalitics involved in the stitchmaking operation.

The rock shaft to which the arm 7.) and H are affixed has another arm Ht). corresponding to 74, connected by a link with the needle bar of the stitching mechanism for the upper corner of the mattress as will be readily seen in Fig. 3 without need of designating characters. which are conscqucntly omitted in Fig. El where both stitching mechanisms are shown.

For the production of thc stitch employed in the present embodiment of the invention it is necessary that the needle should make a slight lateral movement between its two successive desccnts so as to penetrate the material the second time at a short distance from the place of the first penetrat on. the material lying between the two lines of penetration being what is encircled by the loop of twine pertaining to the stitch.

To provide for such latmal movement of the needle as shown in the present embodiment of thc invenion thc nccdle bar 72 is adapted to have a slight pivotal or rotary movement in the guides in which it reciprocates. such movement being accommmlated in the connection between the link 73 and the needle bar as shown in the enlarged dctail Figs. 23. 24. and such oscillation of the needle bar in one direction after its first rise from the fabric. and in the other direction after its second rise. is effected by the constrlu-tion best shown in the detailed view Figs. 17 and 18.

The boss on the needle ba r with which the link 73 is connected is provided with a projection 77 (see also Fig. 23) which travels in a guide in a. plate or in: r TH having at its ends inclined guiding portions 79 adapted to move longitudinally in suitable guideways in the frame 60, such longitudinal movement thus resulting in a short lateral movement of the plate 7 8 which by the projection 7? causes a slight rocking of the needle bar 72 and a considerably larger lateral movement or shogging o the needle 100 because it is carried by its arm "71 at a considerable distance from the axis of the needle bar. I

The slight longitudinal movement of the plate "(8 necessary to elfect such lateral movement of the needle bar is produced by a short rack 80 (see Fig. 4) engaged by a toothed segment on a cam lever 81 operating in a groove in the cam 52 which produces a movement of the plate 78 or needle shogger in one direction about as the needle completes its first rise from the material' and in the other direction about as the needle completes its next rise from the material, the plate remaining stationary during substantially the whole of each complete down and up stroke of the needle.

The work support 63 and presser foot 65 each have two guide passages for the needle, as best shown in the sectional details Figs. 7 and R. with a slot connecting them sufiicient for the passage of the twine as shown in Figs. 10 aml 17. the needle thus being supported and guided close to its point of entrance and emergence. 1

Referring now to the instrnmentalities involved in the stitch forming operation they will first be described in connection mainly with Figs. 5 to 13 inclusive. with reference to their coiiperation in acting on the twine to form the stitch. after which the connecting mPVllflIllr. by which the several instrumentalitiesarc actuated in proper time and relation to one another will be described.

For convenience the complete set of instrumcutalities which cooperate with the needle and. twine where from the fabric regarded as a unit will be called the kuotter. and said instrumentalities for the most part are mounted on or in the body piece 101 which is mainly cylindrical in form and is mounted for rotary movement in a bearing in the framework 60 as appears in the sectional view Fig. 4.

The devices which cooperate most directly with the twine are contained in a tubular portion 102 (see 103 mounted to rotate on said tubular portion 102 as a bearing, said tube 102 being fixed in an eccentric position in the knotter body 101 so that a rotation (in this case a quarter turn) of the latter shifts the tube and parts contained in and carried thereby laterally and at the same time produces a rotary change of position of the tube and parts contained in it for a quarter turn as will be understood by comparing F i s. 7 and 8. such movement having shifter the axis of the tube 102 from a position in line the needle emerges ig. 4) and on a sleevewith the needle at one descent to the position in which the needle makes its next descent.

As is well shown in Fig. 4 and on a lar r scale 'in Fig. 12 the work support 63 and t e shank or bracket by which 1t is ri 'dly connected to the frame 60 are forme with an opening between them sufiicient to accommodate al of the movements of the knotter mechanism.

As shown in Fig. 5 at the first descent of the needle (which is an eye pointed needle of the usual kind) a bight or hitch of the twine is carried through and be end the material, the fold 110 eing at t e needle eye, and the standing part, 11.1 of the twine leadin back to the spool or supply suitabfia guides and controlling devices which wil be described later, while the end part 112 of the bight is long enough to remain in the material of the mattress which in connection with the work support 63 holds the end with friction sufiicient to produce a slight tension if pulled upon.

The first descent of the needle is at the right hand oneof the guideways in the presser foot and work sup ort as seen in igs. 7 and 8, and at the time of the first descent the knotter body stands in the position shown in Figs. 5, 6 and 7 in which a pair of twine gripping jaws 120, 121 stand sli htly apart so that the needle carries the en twine 112 of the bight directly over the slight space between the jaws 120, 121, of the gripper which at this moment are slightly apart, and preferably after the needle has started slig tly on its rise to, the position shownin 1* ig. 6 so that the end thread 112 is loosened and thrown slightly away from the needle, said jaws rip the end twine and hold it firmly while the needle completes its rise thus bringing the twine to the condition shown in Fi 7 in which the end portion 112 of the bight is held by the gripper while the standing portion 111 is drawn back above the gripper jaws although perfectly free from them.

. After the end part 112 of the twine has been thus seized by the jaws of the gripper an end controlling fing'er or hook 122, the form mnd action of which is best shown in Fig. 0, on the sleeve 103 makes a slight movement sullirient to engage the end part 112 between the points where it is held by the gripper jaws and where it emerges from the material.

The end part 112 of the first bight of the twine having been thus seized by the gripper jaws and engaged by the controlling finger 122 of the knotter; the knotter body is then rotated from the position shown in Fig. 7 to that shown in Fig. 8, in which movement the gripper jaws and parts associated therewith are shifted into position to be in line with the needle at its next descent,

through i and at the same time have made-a quarter turn. In thus turning they bring a ve or o 11 slot 123 in the jaws in line wlth the nee e and have left the end portion 112 of twine wrapped part way around the jaws of body of the tube 102 from the point where the end emerged from the jaws in'the position shown in Fig. 7 to the finger 122,

about which a bight is formed, the extreme end of the twine having been thus pulled nearly or quite free from the material and work holder as shown in 8.

The standing part 111 o the'thread extends almost directly from the gripper jaws to the fabric in the first needle hole, or one shown at the right hand in Figs. 7 and 8.

In this movement the first bight presented by the needle has been converted into a loop with the part 111 crossing over the part 112 and the portion 113 of the loop of twine which is wrapped around the tube 102 lies just above a loop spreader consisting of two finagers 124, one at each side of the groove 12 The knotter parts bein in the osition shown in Fig. 8, the nee le makes its next descent as shown in Fig. 9 and just before the point of the needle arrives at the gripper aws the fingers of the loop spreader 124 are momentarily raised and thus lift the portion 113 of the twine so that the needle passes between it and the end of the jaws, the needle in its further movement passing over the portion of the thread still gripped in the jaws so that a new or second bight 115 of the twine has been passed through the loop formed from the bight of the twine presented to the knotter at the first needle descent. Directly after the needle has passed under the twine at 113 the fingers 124 descend to their normal position and free the portion 113 of the twine, which now becomes practirally free from where it emerges from the jaws (at the left hand in Fig. 8) to where it is engaged by the finger 122 and lies loose over the second bight of the needle twine. The jaws 120, 121, of the gripper also release the twine, leaving the loop loose around the second bight.

With the parts in the position shown in Fig. 9 and preferably after the needle has risen slightly to slhcken the twine. the sleeve 103 makes a further rotary movement, in which a bight spreading finger 125 passes between the needle and the end twine 115 of the second bight and spreads the said bight so that the finger 122 and bight of end twine of the first needle bight engaged therein is passed entirely through the secomlbight at 115, and the extreme end of the twine is drawn free from the material and work so loft and is in position to be seized by t e aws of a puller or knot tightener 130 as shown in Fig. 10. A stop projection or retarder 126 on the jaw 121 prevents the second big-ht from being dragged along by the bight spreader 125. and the end of twine which is being passed through the bight by the finger 122.

The end twine 112 presented to the knotter by the first descent and rise of the needle, has thus been looped around. and passed through the bight presented at the second needle descent. in proper relation to tie the said end to the said bight with the well known weavers knot and it remains only to draw the knot tight and to cut oli' any excess twine at the free end and to cut off the standing twine between the knot and the needle in such manner as ,to leave a tree end extending from the needle ot' suflicient length for the end part of the first bight formed by the first needle descent at the next stitchin forming operation.

hese operations of tightening the knot and cutting the twine and the parts concerned therein are best illustrated in Figs. 10 to 13 inclusive, and Fig. 17 and comprise the knot tightener. marked as a whole 130, including a pair of jaws. the lower member 131 of which is pivotally mounted on a bracket 133 afiixed to a rock shaft 1.34, by turning which the free end of the jaws may be given a movement from close to the knotter devices as shown in Fig. 10 outward to the position shown in Fig. 11, in which movement the end 112 of the first bight of twine, which by the operations above described has been looped around and then passed through the second bight 115 as shown in Fig. 11. is properly tightened in conjunction with the rise of the needle from the osition shown in Fig. 10. to that shown in i 11 which takes up or shortens the bight 115. and as the needle continues to rise and the tension on the end 112 is maintained by the puller 130 the knot is finally drawn tight and pulled through the needle hole into the stufling of the mattress as appears in Fig. 12. thus having produced a complete endless loop of the twine, which encircles within it small portions of the bottom and side covering fabrics and the portion of the stufling lying between them.

The end 112 held by the tightening device 130 and the standing twine 118 between the knot and the needle which now stands at some distance frointhe presser foot and material, are then .cut off by cutters 150 working in guidevvays in the work support 63 and presser foot 65 across the second needle guideway, said cutters being operated by actuating mechanism which will be described later, with a quick movement to sever the twine, about at the time that the needle completes its rise after the stitch has been completed.

Referring again to the knot tightening device 130 the lower jaw or member 131 is pivotally connected with the bracket 133 at 135 and is normally held by a spring 136 against a stop 137 on the bracket 133 so that in the tightening movement of the needle the puller does not act positively, but merely resists the all of the needle to the extent of the tension applied to the free end 11.2 of the twine by said spring 136. The upper jaw 132 is pivoted to the lower jaw at 138 and is acted upon by a spring 139 (see Fig. 17) which not-mall tends to close the jaws upon the twine, tiey being however normally held apart by a catch or trigger 140, (see Fig. 13) which is tripped just after the knotter devices arrive at the position shown in Fig. 10, so that the end 112 of the twine which has just been brought by the rotation of the sleeve 103 to the position shown in Fig. 10 just over the lower jaw 131 is snapped upon and gripped by the action of the spring 139 on the release of the upper j a w by the disen agement of the tri ger 140.

When the end of the twine has iieen out as above described the puller 130 is moved promptly by the spring 136 against the stop 137 and in a further movement of the bracket 133 :1. Finger or projection 141 on the upper jaw member near its pivot strikes a fixed jaw opening stop 142 as will be understood from Fig. 12 which causes the upper jaw member to be lifted so that the trigger 140 catches beneath it and holds it open until tripped at the next operation. The natural expansion of the mattress, when relieved from the pressure of the presser foot and work support causes the loose ends of twine to disappear inside of the mattress covering fabric.

This tripping of the upper jaw of the twine puller is effected by a projection 143 carried by the actuating annulus 104 for the sleeve 103 of the knotter, which will be referred to later, which projection engages the trigger at the end of the movement by which the end of the twine has been pushed through the second needle bight as shown in Fig. 10, so that the jaws close just at the moment when the end of the twine is presented to them by the action of the finger 122, di rectly after which the sleeve 103 makes its return movement to the position shown in Fig. 11 which frees the end engaged by the linger 122 and also withdraws said finger and the loop spreader 125 from the second bight, leaving said bight free to ti hten with the loop made from the first big t, as well shown in Fig. 11. I

In addition to the needle and parts of the knot-tor which coiiperate to form the knot as has been described, there are certain instrumentalities which control the tension or pull on the twine at certain times in order to cause the knot to draw up properly and to cause it to be pulled into the material as shown in Fig. 12; these tension or twine ripping devices being mainly shown in Figs. 18 .to 21 inclusive. the detailed description of which is de [erred until after the description of the mechanical connections by which the various instrumentalities of the knotter mechanism which have already been described are actuated to perform the required movements in proper timed relation to one another and to the movements of the needle. i i

' For moving the knot tightener 130 to pull up the knot the rock shaft 134 on which the bracket 133 is mounted and which has its hearings in the frame (it) is provided with .an arm 14;"; adapted to be operated by a suitable cam plate 146 on the cam disk 56 (see. Figs. 17 and 27). i

The mechanism for turning the body portion 101 of the knotter from the )osition shown in Fig. 7 to that shown in 1* lg. 8 is effected by the segmental gear 105 best shown in Fig. 17, fixed to or forming a part of the said knotter body 101 and actuated by-the segmental gear H3 on the lever 81. before referred to. which through the gear teeth 82 engaging with the. rack H11 operates to shift the plate 8 by which the lateral or shogging movement of the needle is effected.

The movement of the lever 81 in one. direction takes place when the needle has risen after the first stroke, and shifts the looper body and parts carried by it from the position shown in Fig.7 to that shown in Fig. H at the same time that the plate 78 is moved to shift the needle to the position for its next stroke, and the return movement of the lever ill by which the knotter body is moved back from the iosition shown in Fig. 8 to that shown in big. 7 takes place about as the needle completes its rise from the material at the end of the second needle stroke. and at the same time the plate 78 is shifted back. returning the needle to the proper po-- sition for the first stroke of the next stitch.

The jaws 120. l2l of the gripper are operatedby the mechanismbest shown in Figs. 22 to an. lleferring to Fig. 22. the jaw l2l is fixed in the tube 102. the opening and closing movement of the jawsbeing confined to the jaw 12" which is shown in Fig. 2; in the open position. The movable jaw 120 is formed at the end of a lever (320 fulcrurned at ($21 in the tube 102 and connected at its end remote from the jaw. with a jaw actuating slide (322 adapted to work in a transverse guidcway in the tube 102 and being slightly longer than the outside diameter of the tube so that 'whcn one end is flush with the outside of the tube the other end projects slightly therefrom.

It will be understood from Fig. 22 that by pressing the projecting end of the bar 622 inward to a point. flush with the outside of the tube the jaw 120 will he closed toward thejaw 121 and the other end of the bar 622 with internal cam recesses 24 which are not diametrically opposite to one another, and thus cause the bar 622 to be shifted from one to the other position to open or close the jaws-as shown in Figs. 25, 26 by a comparatively slliort rotary movement of the ring 623 on the tube v102.

To produce this jaw opening and closing movement of the ring 623 at the proper times. it is provided with an eccentric stud or projection 62;") in proper position to be engaged by a cam block 626. (see Figs. 23. 2-4) mounted on a rod (32? adapted to slide in a suitable guide way connected with the. frame (it) and provided with a hub, or block 62h engaged with an arm (529 on a' rock shaft provided with an arm (330 operated by suitable projhctidns 631 on the cam disk 55.

The cam block 626 is first operated when the knotter body isin the position shown in Figs. 5. (3 and 23. just as the needle begins to rise after its first descent. and by engaging the projection (v25 when in the position shown in Fig. 23 moves it from the position shown in Fig. 25 to that shown in Fig. 26, and turns the ring 623 so as to cause the jaws to close so that they grip the end portion of the bight of twine which has just been laid between them by the needle.

The knotter body is then shifted from the position 'shown in Fig. 7 to hat shown in Fig. R as before described. 11;; cam ring i323 moving with if to the position shown in Fig. .24. being frictionally held relatively to the tube and having no further action on the jaw operating bar 6152 so that the jaws remain closed. Then at or near the end of the second needle descent (after it has passed the bight through the loop) the cam block (5126 is again operated in the same direction as before. but by reason of the changed position of the projection of the ring it turns the said ring in the opposite direction. or from the position relative to the bar 622 shown in Fig. 26 to that shown in Fig. 2."). and thus separates the jaws to release the loop alter the needle has been properly passed through the same as indicated in Figs. 9 and ill.

The loop spreading pins 124 are fixed in rods 424. (Fig. 22) extending through the tube 102 and connected with a slide block 425 at the lower end thereof which is acted upon by a spring 426 tending to press the block 425 downward or outward from the 130 

